Edge-runner or vertical millstone



(No Model.) 4 Sheets-Sheet 1.

j H. MANTEY. EDGE RUNNER QR VERTICAL MILLSTONR. No. 487,930. PatentedDeo. 13,1892.

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(No Model.) 4 sheets-sheet 2,

, H. MANTEY.

EDGE RUNNER 0R VERTICAL MILLSTONE.

PatientedrDeo. 13, 1892.

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(N0 Model.)

4 Sheets-Sheet 3. H. MANT'EY.y Y EDGE RUNNER 0R VERTIGAL MILLSTONE.

N o. 487,930. Patented Dec. 13, 18972.

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(No Model.) 4 Sheets- Sheet 4.

H. MANTEY. EDGE RUNNER OR VERTICAL MILLSTONE.

No. 487,930. Patented Dec. 13, 1892.

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UNITED STATES PATENT OFFICE.

HENRY MANTEY, OF ORIZABA, MEXICO.

vEDGE-RUNNER OR VERTICAL lVllLLSTON/E. i

SPECIFICATION forming part of Letters Patent No. 487,930, dated December13, 1892.

Application filed September 8, 1892. Serial No. 445,323. (No model.)Iatented in Belgium PebruarylZ. 1890, No. 89,496 in France February12,1890, No. 203,838'. in Mexico August 7, 1890, and in Germany December24, 1890, No. 58,110.

Toa/ZZ whom it may concern:

Be it known that I, HENRY MANTEY, a citizen of the United States,residing in the city of Orizaba, in the State of Vera Cruz, Mexico, haveinvented a new and useful Improvement in Edge-Runners or Vertical Mill-Stones, (for which I have obtained Letters Patent in Belgiu m, No.89,496, dated February 12, 1890; in Mexico, dated August 7, 1890; inFrance, No. 203,888, dated February 12, 1890, and in Germany, No.58,110, dated December 24., 1890,) of which the following specication,taken in connection with the accompanying drawings, is a full, clear,and exact description, such as will enable those skilled in the art tomake and use the same.

My invention relates to an improvement upon the millstones described andclaimed in my allowed application, Serial No. 417,196, led January 6,1892,in which the millstones are mounted upon axles arranged in the samehorizontal plane of rotation, but in different vertical planes, whichvertical planes are forwardly inclined with relation to the radius ofrotation and do not pass through or cut the central verticaloperating-shaft. The object of this arrangement is to obviate thetendency of the millstones to press outwardly on their bearings underthe iniuence of the centrifugal force, and thereby to obtain a decreasein the wear of the axles and bearings.

The action of my improved mill, described in my above-named application,may be explained as follows: The resistance on the working faces of allcylindrical vertical millstones is exerted in a direction parallel withthe tangent of the circle of revolution, and

the stones tend to move in the same direction. In the common form ofvertical' millstones the axles upon which the stones are mounted extendradially from the vertical operatingshaft, and consequently theresistance on the working faces of the stones is exerted at right anglesto their axles, and the tangential tendency of the stones, which movesthem outwardly on their axles, is not counteracted. Therefore with thisform of mill the centrifugal force which results from the rapidrevolution of the millstones is materially aided by the outward tendencyof the stones, caused by the friction on their working-faces, and ittends to throw the stones outwardly on their bearings with greatforceand causes a great deal of wear. In my improved form of mill,however, the supporting-axles do not extend radially from the verticaloperating-shaft, butare supported therefrom by a suitable boxing in suchrelation that they will be inclined to the radius and tangent of thecircle of revolution, so that the resistance on the working faces of thestones (which is always in a direction parallel to the said tangent)will give them an inward tendency on their axles and counteract theiroutward tendency from the centrifugal force.

In the operation of this style of millstones it is obvious that thecentrifugal force varies with the rate of speed atwhich the mill is run,and therefore it is very desirable to be able to adj ust the inclinationof the axles to the tangent of the circle of revolution to correspondwith the rate of speed, and itis the object of my present invention toprovide means for accomplishing this result.

To this end my invention consists, broadly, in providing means forregulating the angle of inclination of the axles to the radius ortangent ot' the circle of revolution.

In order that my invention may be fully understood, I- will iirstdescribe the same with reference to the accompanying drawings, and thenmore particularly point out in the claims what I deem as new therein.

In the drawings, Figure 1 is a front edge View of a mill representingthe preferred embodiment of my improvement, the stones being mountedupon adjustable crank-axles and the pan being shown in sect-ion. Fig. 2is a topl plan view of the same, the vertical operatingshaft being shownin section. Fig. 3 is a detail top elevation of a modified arrangementfor adjustably connecting the crank-axles to the operating-shaft. Fig. 4is a detail edge view of the same. Figs. 5, 6,andl7 are detail views ofa further modification showing simple axles pivoted to the boxing andhaving set-screws for adjusting their position. Figs. 8 and 9 are detailtop and side elevations of another form of my improvements in which theaxles Figs. 10, 11, 12,

are pivoted to the boxing.

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therein by the nuts F F.

and 13 are detail top and side elevations of further modifications. Fig.14 is a diagrammatic representation of a mill employing four stones, towhich my improvement can also be applied. Fig. l5 is adiagrammaticviewillustrating the action of my improved mill. Fig. 16 is a detailsectional view taken on the line 16 16 of Fig. 2.

In Figs. 1.and2, which represent the preferred embodiment of myinvention, A A are the vertical millstones operating, as usual, in thepan A', and B B are adjustable crankaxles,having the innerjournal ends bb, which are mounted in adjustable boxes, presently to be described, andthe outer journal ends b b', upon Whichrthe millstones A A are mounted,as shown. Cis the central vertical operatingshaft mounted in suitablebearings and driven by suitable gearing. D is a cross-beam keyed to theshaft C and formed with curved portions d d, extending, respectively,from points near the center of the opposite edges of the beam to theouter ends thereof. The ends of the beam D are formed With horizontalcross cuts or slots for the reception of the adjustable journal-boxes. EE are the adjustable journal-boxes, in which the inner journal ends b bof the crank-axles are journaled. These boxes t in the cross-cuts of thebeam D and are formed with upper and lower curved flanges e e', Whichbear against the curved portions d d of the cross-beam. Suitable bolts FF extend from the curved faces of the crossbeam and pass through slotsff in the curved flanges e e of the boxes E E', and are held It isobvious that by loosening the nuts F F the boxes E E', carrying withthem the crank-axles, can be adjusted on the curved faces of thecrossbeam so as to change the inclination of the outer bearing ends b bof the crank-axles B B to the radius and tangent of the circle ofrevolution.

In Figs. 3 and 4, C is the vertical operating-shaft. G is the cross-beamkeyed to the shaft C, and H II are crank-axles adjustably connected tothe opposite ends of the crossbeam G. J J are journal-boxes having iatgrooved under facesj j,which rest on the upper face of the cross-beam Gnear its opposite ends and are adapted to slide thereon. The innerjournal ends h and h of the crankaxles H H are journaled in the boxes JJ and retained therein by linchpins K. g g are vertical longitudinalslots arranged cen- 'trally inthe ends of the cross-bar G, and

g g are set-screws passing through said slots and engagingscrew-threaded openings in the under sides of the journal-boxes J J. Byunscrewing the set-screws the boxes J J, carrying With them thecrank-axles, may be adj usted longitudinally on the cross-beam G, Whichchanges the angle of inclination of the outer axle ends h h of thecrank-axles (upon which the millstones are journaled) to the radius andtangent of the circle of revolution, as in the preferred form of myimprovement.

In Fig. 5, 6, and 7, C is the central vertical operating-shaft, to whichis keyed an oblong boxing L, having flaring mouths or socketsl Z at itsopposite ends, in which the enlarged ends m m of the axles M M arehorizontally pivoted by means of pivot-pins rm m. N N and N N areset-screws operatingin the side walls of the mouths or socketsl Z at theopposite ends of the boxing L and adapted to engage the enlarged ends mm of the axles for regulating the angle of inclination of the axle withrelation to the radius of revolution. By respectively unscreWing andscrewing up the set-screws at the opposite sides of the' socketsl Z itis obvious-that the axles will be moved on the pivots 'rn'm and theirposition changed.

In Figs. 8 and 9 I have shown a somewhat simpler arrangement, in Whichlthe millstone axles are also adjustably pivoted to their boxing. C isthe vertical operating-shaft, and O is the boxing keyed to the shaft.The boxing is formed with projecting shoulders o o and slots 0 o in theends and shoulders. The axles P are formed With right-angled extensions19 p, and are pivoted at Q Q in the slotted ends of the boxing O, sothat the extensions p p will normally rest inthe slots of the shoulders0 o. R R are screw-bolts passing through corresponding perforations inthe shoulders o o and projections p p, by means offwhich the axles canbe adjusted on their pivots.

In Figs. 10 and 1l the cross-beam S is formed with oppositely-extendingflat faces, to which the enlarged ends tt of the axles T are secured bymeans of bolts s s, passing through perforations in both of them. PlatesT T are placed between the ends of the axles and cross-beam to regulatethe angle of inclination of the axles, a change in the thickness of theplates changing the inclinations.

In Figs. 12 and 13 the cross-beam U is keyed to the operating-shaft Cand formed with longitudinal ridges u et. The axles V V are formed WithenlargedA ends 'v e, having longitudinal grooves n e', corresponding toand fitting over the ridges u u of the cross-beam. The adjacent faces ofthe cross-beam U and axle ends e t: are serrated, as shown, so as tomore intimately engage each other. U U are screw-bolts projecting fromthe opposite faces of the cross-beam and passing through correspondingslots in the ends of the enlarged axle ends o u and held in any adjustedposition therein by the nuts uu. By loosening the screw-nuts u u andmoving the axles on the cross-beam it is clear that the inclination ofthe axles with relation to the radius of revolution can be regulated.

In Fig. 14 I have shown my improvements applied to a mill employing fourmillstones. Each axle can be adj ustably supported on the boxing in anysuitable manner, such as shown. The axles are shown with enlarged endsadj ustably connected to the boxing by means of set-screws.

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It is quite obvious that my invention would apply equally as well tothat form of vertical mill in which the stones are rotatively supportedon a suitable axle, which is held in iixed bearings, and the pan is madeto revolve under the stones. This is of course an equivalentarrangement, and the action of the stones is substantially the same.

Fig. 15 represents the action of the form of mill shown in Figs. l and2. in position of the axles B is indicated by dotted lines. The lines l4L indicate the radial changes in the position of the millstones, andthe lines 2 2 represent the tangential change in the direction in whichthe resistance on the working-faces of the stones is exerted. The stoneA when otherwise uninfluenced tends to move at right angles to thejournal end b of the axle, as indicated by the arrow 3, and as the lineof direction constantly gets nearer to the center of rotation until itcrosses the radius 4, which is parallel to the journal end b', itisclear that the stone alone has an inward tendency, which is increasedby the direction of the resistance.

The operation haslalready been explained, and will be clear from theabove description. It is obvious that the position Aof the axles can beadjusted to such a nicety that they will exactly counteract thecentrifugal force at whatever the speed it is desired to run themachine. Of course each adjusted position of the axles will only serveto counteract the centrifugal force up to a certain rate of speed.

Having thus described my invention, the following is what l claim as newtherein and desire to secure by Letters Patent:

l. The combination of the vertical millstones, the axle or axles uponwhich said millstones are journaled, means for revolving said millstonesaround a common center, and means for adjusting the angle of inclinationof the axles to the radius of the circle of rotation, substantially asset forth.

2. The combination of the central operat- The change ing-shaft, thecross-beam or boxing keyed to said shaft, axles adjustably secured tosaid cross-beam or boxing, and vertical millstones mounted on saidaxles, whereby the angle of inclination of the axles with relation tothe radius of revolution can be adj usted, substantially as set forth. Y

3. The combination of the' vertical millstones, the crank-axles uponwhich the stones are journaled, the vertical operating-shaft, across-beam or boxing secured to the shaft, and journal-boxes in whichthe inner journal` ends of the crank-axles are j ournalcd, adj ustablysecured to the cross-beam or boxing, whereby theangle of inclination ofthe axles can be adjusted with relation to the radius 'of revolution, asset forth.

4. The: combination of the vertical shaft, the cross-beam or boxingkeyed to said shaft and having curved'faces or edges, journalboxeshaving curved faces fitting against the curved faces of the cross-beamand adj ustably secured thereto, and crank-axles having inner and outerjournal ends, the inner journal ends being journaled in the adjustableboxes and the outer journal ends supporting`- the millstones,substantially 4as and for the purpose set forth.V j

5. The combination of the vertical shaft, the cross-beam or boxing keyedto said shaft and having the opposite faces or edges curved and theendsY horizontally slotted, journalboxes fitting against the slotted fends of the cross-beam and having curved anges which tit against thecurved portions of the crossbeaxn, screw-bolts projecting from thecurved faces of the cross-beam and engaging'slots in the curved flangesof the journal-boxes, crankaxles journaled in the adjustable boxes, andmillstones mounted on thecrank-axles, sub- 85 stantially as herein setforth.

HENRY MANTEY.

Witness es GEORGE E. AMES, WILSON B. PENNooK.

